ETC Request ID: STIS.ta.1291170

Requested Signal/Noise Ratio = 40.000

gives: Time = 2.2577 seconds

gives: Time to Saturation (for a single exposure) = 446.99 seconds


Plots

Detailed Information Count rate Total counts Associated noise
(e-/s) (e-) (e-)
Counts (box of 3 x 3 pixels)
    Source 924.492 2,087.20 45.69
    Background 0.227 0.51 0.72
        Sky 0.002 3.53e-03 0.06
        Dark Current 0.225 0.51 0.71
    Read Out 25.20
Total in selected region 924.719 2,087.71 52.18
Brightest Pixel (single exposure) 268.463 606.10
Global Count Rates
    Source only 1,848.984 4,174.399
    Background (sky+dark) 26,257.865 59,281.63
Background per unit area
    Sky Background (arcsec-2) 0.070 0.157
    Dark Current (arcsec-2) 10.000 22.577
Extraction region
box of 3 x 3 pixels
    Effective Sky Area (pixels) 9.00
    Fraction of flux 0.50
    Fraction of flux in brightest pixel 0.15
Effective Wavelength 8387.00 Å

Instrument name: STIS
Mode: Target Acquisition
Detector: CCD
Acquisition Mode: ACQ
Aperture: F25ND3
Gain: 4.0
# Frames: 1
Binning: 1
Dark: medium


Target: [point source]
Spectrum: Pickles Models M5V 2951.21K
Extinction E(B-V): None
Normalization: Renormalized to vegamag = 13.07 in filter Johnson/V
Redshift: None
Emission Lines:
Line at Center 2796.0 Å    FWHM 0.5 Å   Flux 1e-15 Fλ
Line at Center 2802.0 Å    FWHM 0.5 Å   Flux 1e-15 Fλ


Selected background:
  Sky Background:
    Level:

Plots

These results were computed using: ETC version 26.1